a-12=-28-a

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Solution for a-12=-28-a equation:


a-12=-28-a

We simplify the equation to the form, which is simple to understand 
a-12=-28-a

We move all terms containing a to the left and all other terms to the right. 
+1a+1a=-28+12

We simplify left and right side of the equation. 
+2a=-16

We divide both sides of the equation by 2 to get a. 
a=-8

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